Since 2002, Planetary Radio has visited with a scientist, engineer, project manager, advocate, or writer who provides a unique perspective on the quest for knowledge about our Solar System and beyond. The full show archive is available for free.

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A Return to Asteroid Mining, and Digging Into Space Ethics with Joel Sercel

Joel Sercel believes we are entering an era in which asteroid mining and other commercial development of space are imminent, but he’s concerned about how we will avoid the mistakes of past eras of human expansion.

A Deep Dive into Asteroid Bennu With Dante Lauretta

The leader of the OSIRIS REx asteroid sample return mission shares more details of last week’s encounter in an exclusive interview, while we also learn about the proposed mission to look for life on Saturn’s moon Enceladus.

Sampling an Asteroid and Searching for Life in Venus' Clouds

The OSIRIS-REx spacecraft appears to have collected its first sample from asteroid Bennu, while a team led by Jane Greaves has discovered what could be evidence of life in the clouds of Venus.

Beyond Earth’s Edge: A Celebrity Space Poetry Jam!

Creators of an outstanding new collection of poems about spaceflight and exploration join Mat Kaplan to talk about the book as Bill Nye and other notables read selections.

Protectors of Earth! (and Other Worlds)

NASA’s planetary protection officer joined Mat Kaplan’s Humans to Mars summit panel for a great conversation about protecting worlds throughout the solar system from what could be devastating contamination.

Exploring the Cosmos With Heidi Hammel and AURA

Astronomer and planetary scientist Heidi Hammel’s AURA shines bright across our solar system and beyond.

A Fond Farewell: Solar System Specialist Emily Lakdawalla

Planetary Society Solar System Specialist Emily Lakdawalla makes a big announcement, and shares stories from her long history with the organization.

Have We Found Evidence of Life on Venus?

It could be a profound and historic discovery made on Earth’s nearest planetary neighbor.

A Planetary Mystery is Solved, and it’s Bill Nye’s Anniversary!

Former Dawn mission director Marc Rayman of JPL reveals the secrets of the bright spots on dwarf planet Ceres, and we celebrate 10 years as Planetary Society CEO with Bill Nye.

The Sirens of Mars Call to Us

Georgetown University planetary scientist Sarah Stewart Johnson chronicles the long history of our fascination with Mars and the possibility of life there, culminating with Perseverance, the new rover now headed there.

Katie Mack and The End of Everything

How will the universe end? That’s the question explored by cosmologist Katie Mack in her very entertaining new book.

Why Aren't There More Earth-Like Planets in our Solar System?

New research reveals why Earth is on its own in this solar system’s habitable zone where liquid surface water flows, but the same isn’t true across the galaxy.

Another Ray Gun Heads for Mars. We Hear It Working.

SuperCam principal investigator Roger Wiens shares how his new and improved laser-based spectrometer will help look for past life in Jezero Crater, while its microphone lets us listen to the Red Planet.

Crew Dragon Triumphant, and a Planetary Society Founder Remembers

Splashdown! The astronaut and former leader of Dragon capsule development at SpaceX is back to celebrate the spacecraft’s successful mission.

Hope Leads the Way to Mars

Our special guests are the leaders of the Emirates Mars Mission whose Hope spacecraft is now headed for the Red Planet.

A Mars Mission Begins, a Comet Exits, and the Future of Planetary Science

The United Arab Emirates is headed for Mars as comet NEOWISE speeds back to the outer reaches of the solar system, and three white papers address the future of planetary science and defense.

How Perseverance will Search for Life on Mars

Join the mission’s deputy project scientist as the Perseverance rover prepares to search for life on the Red Planet.

To Pluto and Beyond with Alan Stern

Principal Investigator Alan Stern returns on the 5th anniversary of the New Horizons encounter with Pluto to tell us about the wealth of knowledge the spacecraft is still sending home from across the solar system.

Jim Bell Sends New Eyes to Mars

The leader of the Mastcam-Z team talks about how the best cameras ever on the surface of Mars will help us explore a region that could once have supported life.

China on the Final Frontier

China has big plans for a space station, exploration of the Moon and Mars, and possibly a mission that will follow Voyager beyond the edge of the solar system.

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